---
id: CVE-2026-48545
title: >-
  Gradio before version 6.15.0 contains a cookie injection vulnerability that
  allows remote attackers to perform cross-Space session fixation by exploiting
  a shared module-level HTTP client used across all users in the reverse proxy
  endpoi…
summary: >-
  Gradio before version 6.15.0 contains a cookie injection vulnerability that
  allows remote attackers to perform cross-Space session fixation by exploiting
  a shared module-level HTTP client used across all users in the reverse proxy
  endpoi…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-384
vendor: gradio_project
product: gradio
affected:
  - gradio < 6.15.0
patched:
  - gradio 6.15.0
published: '2026-05-27'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T16:17:18.010'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-48545'
references:
  - url: >-
      https://github.com/gradio-app/gradio/commit/feb7237d01f359d2ad4ee42d00344e61692b3b39
    label: disclosure@vulncheck.com
  - url: 'https://github.com/gradio-app/gradio/issues/13369'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/gradio-app/gradio/pull/13384'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/gradio-app/gradio/releases/tag/gradio%406.15.0'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/gradio-cookie-injection-via-shared-pro
    label: disclosure@vulncheck.com
  - url: 'https://github.com/gradio-app/gradio/issues/13369'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-48545'
  - url: 'https://github.com/gradio-app/gradio'
  - url: 'https://github.com/gradio-app/gradio/releases/tag/gradio@6.15.0'
tags:
  - nvd
  - cve.org
  - exploit-available
  - osv
  - pip
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-05-27T15:35:33.238298Z'
epss: 0.0035
epssPercentile: 0.28509
aliases:
  - GHSA-7hp7-4p35-3cx2
ecosystem: pip
ingestedAt: '2026-07-08T18:25:47.019Z'
---

## Overview

Gradio before version 6.15.0 contains a cookie injection vulnerability that allows remote attackers to perform cross-Space session fixation by exploiting a shared module-level HTTP client used across all users in the reverse proxy endpoint. Attackers controlling any HF Space can return a parent-domain cookie that the shared client stores and automatically replays into all subsequent proxy requests to other legitimate Spaces, affecting all users of the same Gradio deployment.

## Affected

- `gradio < 6.15.0`

## Remediation

Upgrade past the affected range:

- `gradio 6.15.0`

## Package advisory (CVE-2026-48545)

Affected packages:

- `gradio < 6.15.0`

Patched in:

- `gradio 6.15.0`

Source: https://osv.dev/vulnerability/GHSA-7hp7-4p35-3cx2